cpufreq: speedstep: use cpufreq_table_validate_and_show()

Lets use cpufreq_table_validate_and_show() instead of calling
cpufreq_frequency_table_cpuinfo() and cpufreq_frequency_table_get_attr().

Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --cc drivers/cpufreq/speedstep-centrino.c
Simple merge

diff --cc drivers/cpufreq/speedstep-ich.c
Simple merge

diff --cc drivers/cpufreq/speedstep-smi.c
Simple merge